Window sash locking means



@h 2a ma y P. RIDDLE www WINDOW SASH LOCKING MEANS Filed May 18, 1935 nl. qi

INVENTR ATTORNEY env Patented Feb. 25, 1936 UNITED STATES PATENT OFFICE 12 Claims.

las the only locking means.

The principal object of the invention is to provide an improved sash lock of the above type which when in locking position cannot be unlocked without the use of a special operating key or the like, thus rendering it practically impossible for an unauthorized person to operate the lock through an opening which may be cut in the Window by such a person.

Another object of the invention is to provide Ala safety-lock for sashes which has, in addition to the novel features referred to above, the added feature of permitting either r both or the sashes of a window to be respectively raised and lowered a distance suicient to provide proper ventilation but insufficient to permit any entrance of a person into the room through the window.

Other objects and advantages will appear in the following more detailed description of the invention.

In the accompanying drawing, Fig. 1 is a fragmentary inner face View of a window frame and the Window sashes mounted therein and embodying the invention, the sashes being shown in their closed position in the sash frame.; Fig. 2 is a vertical sectional view taken on the line 2-2 of Fig.

1, the locking bar of the locking device being shown in full elevation; Fig. 3 is a sectional view which is similar to Fig. 2 except that the lower sash is raised relative to the upper sash; Fig. 4

are fragmentary inner face views of the upper sash and the portion of the safety lock associated therewith, Fig. 5 illustrating the manner of applying the locking bar to or removing it from the associated locking plate attached toKthe sash vand Fig. 6 illustrates how the locking bar is locked by the locking plate against removal; and Fig. 'l is a fragmentary perspective view of av modification of the locking device, in which a v.locking member is employed when it is desired lto lock the sashes closed and in which the locking member may be removed when it is desired to move one or both of the sashes to provide for ventilation.

' Referring nowin detail to the drawing, the ref- "`erence characters I and 2 indicate the top and lbottom sashes, respectively, of a Window which are slidaloly mounted in the usual sash-frame 3.

A side'me'mber 4 of the top sash is provided with a recess 5- which is partially covered by a flat plate 6 secured to the sash side member 4 5 by means of screws 1 or other suitable means. This plate 6 is provided with an elongated opening 8 which establishes communication with the recess 5.

The upper end of the opening 8 in the plate is enlarged and is of general circular form. The platel is also provided with laterally extending through notches 9 which are open at their iimer ends to the enlarged portion of the opening 8.

Secured Ato the upper member I0 of the lower sash 2 just below the plate 6 is a shallow inverted pan shaped member I I which is secured to the sash member I (I Yby means of screws or other suitable means which are passed through openings I2 in the horizontally disposed web or the member II. The peripheral flange I3 of the member rests on the top surface of the sash member IU.

The web of the member II is provided with an opening I4 adapted to accommodate the lower end` portion of a lockmg bar or strut I5 which will be hereinafter more fully described.

Secured inV place at the underside of the web of the member Il is a spring detent I6 which crosses thel opening I 4 and is adapted to automatically engage the locking bar as will hereinafter appear.

As shown in Fig. 4 the peripheral flange I3 of the member II- is provided with a small opening through which a key I'I having a hook for engagement with the free end o-f the spring detent I6, is adapted to be passed.

The locking bar or strut I5 is provided with legs I8 and I9 which are disposed at substantially right angles to each other, the leg I8 being adapl 40 ed to be disposed vertically and the leg I9 horizontally. The leg I9 is provided with guide notches within which the edges of the plate 6 which dene the narrowest portion of the opening 8 are adapted to extend. 5

Projecting from the sides of the leg I9 and located between the end thereof and the notches 20 are oppositely extending safety lugs 22 which are located below the axis of the leg.

The leg I8 adjacent its lower end is provided with locking notches 23 each of which, as Will hereinafter appean-is adapted to engage with the spring detent I6.

When ,it isdesired to` lock the window sashes against excessive movement from 'the outside, the 5 the key I1 is inserted in the opening in the flange end of the leg I9 of the locking bar I5 is rst inserted in the enlarged upper end portion of the opening 8 and then turned so that the leg I8 extends upwardly as shown in Fig. 5. With the locking bar in this position the safety lugs 22 are passed through the notches 9 to the back side of the plate 6. The bar is now turned about the axis of the leg I9 so that said leg extends downwardly as shown in Fig. 6. In this position the safety lugs 22 will be below the notches 9 and, being back of the plate 6, they are adapted to prevent the bar from being removed unless it is again moved to the position in which it is shown in Fig. 5. Further, with the bar in this position, the lower end of the leg I8 will be in alignment with the opening I4 in the member II, so that when the bar is forced downwardly to its normal position as shown in Figs. 1 and 2, one of the notches 23 will be automatically engaged by the spring detent I6 and as a consequence the bar will be locked against vertical movement relative to the top member I of the bottom sash.

It will be noted that with the locking bar I5 thus positioned, the lower sash may be raised or the top sash lowered or both sashes moved a limited distance for ventilation, the engagement of the upper wall of the recess 5 by the leg I8 limiting the movement of one or the other of the sashes or both as the case may be.

When it is desired to release the locking bar I3 of the member I I and the hooked end is turned to engage the detent I6 and when in such engagement a forward pull on the key will move the detent I6 out of locking engagement with the leg I8 of the locking bar, whereupon the bar is raised out of the opening I4, thus the sashes of the window are unlocked.

In Fig. 7 a modication of the invention has been illustrated which embodies all of the features of form of the construction shown in Figs. 1 to 6 inclusive and in addition includes means for locking the window sashes completely closed.

As shown the plate 6 is provided with two lugs 24 which extend outwardly from the face of the plate and which at their outer ends are each provided withV a downwardly depending ange 25 which is spaced away from the face of the plate. These lugs 24 are arranged one on each side of the opening 8.

When it is desired tolock the window sashes completely closed, a locking member 2E is interposed between the lugs 24 and the leg I9 of the bar as shown in Fig. 7. This member will positively prevent movement of the bar I5 in the opening 8 in the plate 6 and as a result will hold the sashes locked against movement relative to each other.

In this modied construction the plate 6 may be set deeper in the sash member 4 than is the corresponding plate in the construction shown in Figs. 1 to 6 inclusive, so that the lower sash will clear the lugs 24 when one or the other or both of the sashes are moved to Wide open position, or the top member 2 of the sash and the member II may be notched to provide sufficient clearance.

While the sash lock has been described in connection with a pair of window sashes it will be understood that when the window comprises only one sliding sash the plate 6 may be mounted on the side of the window frame 3.

If, by the use of one plate 6 the desired ventilation is not obtained another plate 6 may be mounted directly above the plate shown. This two plate arrangement will provide for more ventilation and yet prevent the sash from being raised a sufficient distance to permit a person on the exterior from entering through the window opening.

While two illustrative embodiments of the in vention have been described in detail, it is not my intention to limit its scope to these embodiments or otherwise than by the terms of the appended claims.

Having now described my invention, what I claim as new and desire to secure by Letters Patent, is:

1. A lock for a sliding window sash comprising a lock member carried by said sash, an interlocking member carried by a window element which is separate from said sash, a strut locked to both of said members and being slidable in the direction of its length a limited distance relative to one of said members to permit said sash to be moved a corresponding distance only, and means locking said strut to one of said members and releasable only by means of a separate especially shaped key.

2. A lock for a sliding window sash comprising a lock member carried by said sash, an interlocking member carried by a window element which is separate from said sash, a strut locked to both of said members and being slidable in the direction of its length a limited distance relative to said interlocking member to permit said sash to be moved a corresponding distance only, and spring means enclosed by said lock member for locking said strut to the lock member and operable by a key insertable through an opening in the member for unlocking said strut from the lock member.

3. A lock for a sliding window sash comprising a lock member carried by said sash, an interlocking member carried by a window element which is separate from said sash, a strut having a leg portion locked to the member carried by the sash and having a leg portion disposed at an angle to the first mentioned leg portion slidably mounted in the member carried by the window element to permit the sash to be moved a limited distance, means locking the first mentioned leg portion tothe lock member carried by the sash, said means being movable out of locking relation with said leg portion by an especially shaped key insertable in the lock member, means carried by the leg portion slidably mounted in the interlocking member carried by said window element for interlocking the leg portion to the member against removal, the last mentioned means .being arranged to permit the removal of the leg from the interlocking member upon movement of the strut a predetermined distance in a rotary direction about the axis of the leg portion.

4. A lock for a sliding window sash comprising a lock member carried by said sash, an interlocking member carried by a window element which is separate from said sash, a strut having a leg portion slidably mounted in said interlocking member carried by said window element, means carried by said leg portion and engaging the interlocking member to prevent removal of the leg portion from the interlocking member, and having a leg portion disposed at an angle to the first mentioned leg portion and locked to the locking member carried by said sash, and adapted to be unlocked by means insertable in the locking member, the locking means carried by the rst mentioned leg portion being movable to a position for permitting the removal of the strut from the interlocking member upon movement of the second mentioned leg portion out of locking relation with the locking member and the rotation of the strut about the aXis of the rst mentioned leg portion a predetermined distance.

5. A lock for a. pair of sliding window sashes comprising a plate secured to one sash and having a slotted opening formed therein, a plate secured to the other sash and having an opening formed therein, a removable locking strut locked to both of said plates, one end of said strut being slidably mounted in the first mentioned plate within said slotted opening to permit a relative movement of either one or both sashes, and means locking said strut to the second mentioned plate and operable by an especially shaped key for releasing said strut from the second mentioned plate.

6. A lock for a pair of sliding window sashes comprising a plate secured to one sash and having a slotted opening formed therein, a plate secured to the other sash and having an opening formed therein, a locking strut having two legs each disposed at an angle to the other, lugs on one of said legs which together with the leg are insertable through said slotted opening only when the other leg is pointing upwardly, said lugs when said other leg is moved to point downwardly cooperating with the plate to lock the strut against removal from the plate, said slotted opening in the rst mentioned plate permitting the strut to be moved downwardly relative to the first mentioned plate to permit the insertion of said other leg into the opening in the second mentioned plate, and means operative automatically upon the insertion of said other leg portion in the opening in the second mentioned plate to lock the strut to the second mentioned plate, the slotted opening in the first mentioned plate permitting a limited relative movement between the sashes to provide for ventilation.

7. A lock for a pair of sliding window sashes comprising a plate secured to one sash, a plate secured to the other sash, a strut, means locking said strut to one of said plates against movement relative thereto, means interlocking the strut with the other plate and permitting a limited relative movement between the strut and said other plate and consequently between the sashes to provide for ventilation.

8. A lock for a pair of sliding window sashes comprising a plate secured to one sash, a locking element associated with said plate, a strut having a portion extending through an opening in said plate and locked by said locking element against movement relative to the plate, a plate secured to the other sash, said strut having a portion slidably mounted in the last mentioned plate to permit a limited relative movement between the sashes for ventilation, and means carried by the last mentioned portion of the strut cooperating with the last mentioned plate to interlock the last mentioned portion of the strut against removal from the plate.

9. A lock for a pair of sliding window sashes comprising a plate secured to one sash, a locking element associated with said plate, a strut having a portion extending through an opening in said plate and locked by said locking element against movement relative to the plate, a plate secured to the other sash, said strut having a portion slidably mounted in the last mentioned plate to permit a limited relative movement between the sashes for ventilation, and means carried by the last mentioned portion of the strut cooperating with the last mentioned plate to interlock the last mentioned portion of the strut against removal from the plate, said locking element being movable out of locking relation with said strut by means of an especially shaped key insertable through an opening of small diameter formed 'in the rst mentioned plate.

10. A lock for a pair of sliding Window sashes comprising a plate secured to one sash, a locking element associated with said plate, a strut having a portion extending through an opening in said plate and locked by said locking element against movement relative to the plate, a plate secured to the other sash, said strut having a portion slidably mounted in the last mentioned plate to permit a limited relative movement between thev sashes for ventilation, and means carried by the last mentioned portion of the strut cooperating with the last mentioned plate to interlock the last mentioned portion of the strut against removal from the plate, said locking element being movable out of locking relation with said strut by means of an especially shaped key insertable through an opening of small diameter formed in the rst mentioned plate, said means carried by the strut being movable out of interlocking relation with the said cooperating plate upon a rotary movement of the strut relative to the plate.

11. A lock for a sliding Window sash comprising a lock member carried by said sash, an interlocking member carried by a window element which is separate from said sash, a strut locked to both of said members and being slidable in the direction o-f its length a limited distance relative to said interlocking member to permit said sash to be moved a corresponding distance only, and means adapted to engage said strut and said interlocking member for locking the strut against movement relative to the interlocking member.

l2. A lock for a pair of sliding window sashes comprising a plate secured to one sash and having a slotted opening formed therein, a plate secured to the other sash and having an opening formed therein, a removable locking strut locked to both of said plates, one end of said strut being slidably mounted in the first mentioned plate within said slotted opening to permit a relative movement of either one or both sashes, and means adapted to be placed in engagement with the rst mentioned plate and the portion of the strut slidably mounted therein for locking the strut and thereby the sashes againstl movement relative to said rst mentioned plate.

PARKER RIDDLE. 

